Feed mechanism for mixing-mills.



P. 5. WELTGN.

FEED MECHANISM FOR MIXING MiLLS.

APPUCATIQN FILED MAR, 10, 19m.

atented Apr. 6, 1915.

narran erarias rara-ufr oriana ARK E. WELTOE', 0F AKRON, OHIO, ASSIGNORTO KATHARINE B.'WELTON, OF AKRON,

OHIO. v

FEED MECHANISM FOR MIXING-MILLS..

ideama..

.To all whom 'it' may concern Be it -lrnown that l, PARK E. EVELTON, a

citizen. of the United States, residing at Akron, in the county ofSummit and State of Ohio, have invented a certain new and usefulimprovement Feed Mechanism' ttor Mixing-Mills, or' which the followingis a rfull, clear, and exact description.

. rEhe object of this invention is to provide a novel endless beltfeeding mechanism for returning to mixing rolls' the rubber compositionwhich has been passed between them, whereby the mixing operation will besubstantially continuous until completed.

The object'o the invention is to provide eiiicient, durable and easilyoperated mechanism by which said belt may be rendered operative, or maybe moved out of the way as required. l

The invention consists in the construction and combination et partshereinafter described and pointed out denitely in the claims.

In the drawing, Figure l is a longitudinal sectional View of theinvention placed in operative relation with conventionally shown mixingrolls or the usual constructionx F ig. 2 is a sectional end elevation ofthe mechanism shown in `Fig. l.

Referring to the parts by letters, A, A1 represent the inixing rolls ofan ordinary rubber mixing niill.v No attempt has been made to showthe'mechanisni by which they are operated, because that is no part ofthe present invention. lt must be assumed, however, that suitablemechanismis associated with these rolls to cause them. to turn at theproper rate in the directions indicated by the arrows placed on saidrolls.

Brepresents a pan which is secured in Aplace beneath said rolls. itsmain function side of theinuchine. Two supports G, G,

Specification of Letters Patent.

are slidably mounted on these rods respectively as guidewayss To eachsupport G an arm H of a roller carrying frame is pivoted on an axisparallel with the axes of the mixing rolls. An idler roll K is mountedon a parallel axis in the outer ends oi" the two arms H. Theendlessapron G runs-over all three of the rolls,-that is'to say, over the rollsK, E and El. A cable J of the proper length is secured atone end to eacharm H, and at the other end to an ladjacent side of the pan. A roller ismounted on each side of the pan in a position to engage the two arms H,when the cable J. does not. p

lVhen the supports G, G, are moved to the left toward the position shownin Fig. 1,v

H,-and support themy Patentedpr. 6, i915. -f

.application tiled. Hatch 10, 1913. Serial No. 753,157.

the arms H, because of their engagement with rollers T, will beswung upinto the poy Y sition shown in Fig. l, whereby apron Gifs brought intocontact with roll A' for something more than one-quarter of thecircumference of the latter. At vthis time the cables J will become tautand will pull on thek arms H. H and so hold the belt tightly' againstthe roll A. 4'Because of this contact the lapron C will be caused tomove in the direction indicated by the arrow placed adjacent to it. Thepartially mixed rubber compound passes down between the two mixingrolls, and will fall onto or be carried into Contact with this apron,andwill be by it carried around the rollA as tar as the apron is incontact with said roll. The rubber compound vwill adhere to the roll, soas to be Carried by Vit overthe top and donn again between the rolls Aand A1. y

`When the rubber compound has been passed between the mixing rolls timesenoughv to eiect a thorough mixture, the two supports Gr are then to bemoved to the right, as shown in F ig. "l, and thereby 'the arms H andthe roller l will be caused to assume the positions indicated by dottedlines .in said ligure. The rubber compound coming down between the tworolls will now drop onto the apron and may be easily removed therefrom,because the apron and roller K and its supporting frame, are in suchposi-l .tion that they do not interfere with such removal. v

ies

In order t6 produce the stated movements relation to the pansubstantially as shown. The piston rod 'in has fixed to its outer end a`rack m1 which is heldin engagement withl a pinion p fixed to a shaft Plocated with res spectto the pan substantially as shown. Connected witheach support and extending to the right therefrom is a sleeve g whichembraces thevv associated rod F. Slidably embracing this sleeve are thetwo eyes 1', r, whichv are rigid parts of a rack li which enJL gageswith a pinion which is likewise fixed to shaft l. rack may be engagedwith the same pinion with which rack fm) engages.,

15 At the outer end of sleeve G is a flange g1 between which and supportG the rack structure R is permitted some independent moveme'nt. Betweeneach rack structureand the associated support G is a compressible' coilspring S which, by acting to move themv apart, yieldingly holds rollerK' and apron C in contact with roll A. B,y admission of any lluidunderpressure into cylinder M atv the proper end thereof the piston rod fm,may be caused to more outward or` inward, as required, with the resultof moving the two rack structures R; and then, in turn, by engaging withthe shoulders g1 or with the springs b, and through them with ksupportsao G, will move' thesaid supports to and from the .two positions Shownby the full 4and dotted lines in Fig. 1. y f Having described myinvention, I claim 1. lIn combination with a pair of mixing 85 rolls,two api'on rolls mounted in lixedbear-l ings, a frame, supports to whichthe lower end of said frame is pivoted, a roller mount? ed in the outerend of said frame, means for moving said supports, a roller for' engage40 ment by one of the side members .of-said.

frame, a cable secured to said frame and to a fixture, vand an endlessfeed apron which I embraces the three apron rolls. y v

,2. In combination with apair of mixing '45 rolls, 'two pairs oflixedbrackets located ina plane below '.suid rolls, a' pair of supportslocatedl near .oiiepair of fixed brackets and l movabletoward and fromthe saine,-a frame' pivotcd to saidsupportga 'roller mounted in the freecud of said frame, a cable fixed at onecnd to'said frame and at'theother' lend to a lixture,'means loi-moving said movable supports, and auendless apron which embraces the three rollers. f

ln combination .with a pair of mixing` rolls,v a pan lcatedbelowthesaine, a pairk of lixed hracketsiu said' pan at opposite ends thereof,V:in apri rolle:` mounted Viii-"each pair o bi" i, guidewaysextendinglengthwise ci ,said pan and located on oppo-z site sidrsliwieol',two 'supports movable upon said 'guideways respectively, aframe pivotcd to said si'e'pporls, a roller mounted in the outerrend olsailll frame, a cable nfixed to said ,frame :andi-to' the pan,Y an Y'endless 0n one side of the machine the a cable secured at its ends tosaid frame and to a lixture, and Ameans for sliding said supports alongsaid guide rods, and an endless apron embracing the three rollers.

5. In combination with a pair of mixing rolls, two pairs of bearingbrackets 'located in a plane elow the mixing rolls, two guide rodsextending between thepairs of bearing brackets,.two supportsrespectively slidable upon said guide rods, a frame -pivolted' to saidsupports, an apron'roller mounted in in each of the pairs of bracketsvreferred to, 'a cable secured at-its ends to saidframe and to afixture,-each of said supports having a.

sleeve connected with it and embracing the associated guide rod, a rackhaving two eyes associated with each sleeve and slidably mountedthereon, a shoulder on each sleeve for engagement with the nearbyrack'eye,-a

spi-ing interposed between each of saidsupi ports and the near by'end ofthe rack, a shaft having pinions engaging 'with said racks, and meansfor turning said shaft in l the outer end'of said frame, rollers mountedeither directiomand an endless apron emi bracing said three rollers.

(5. ln combination with a pair of mixing lrolls, two pairs of bearingbrackets, two

apron rolls mounted respectively in said pairs of brackets,'two supportslocated near one pair of brackets, guideways for said supports, a framepivoted to said supports, an apron roll mounted in the outer end of saidframe, an endless apron which embraces said three rolls, a cableconnected with said frame and. witha lixture, 'a rackk associated witheach' movable support, a spring interposed --between each movablesupport andthe nearby'end' of the rack, a shoulder' connected with eachsupport and adapted tol bev en-v gaged byfsaid rack, a shaft havingpinions with which said two vracks' engage, and means for Vturning saidshaftbackward and lforward. C v v v .i

7. In combi-nation with a pair of mixingrolls, a pan located beneathsaid mixing rolls, a pair of fixed brackets .in said pan at each endthereof, a roller mounted in each pair of brackets, two guide rodsextending between and connected; with the pairs of brackets. ,referredto, two supports movably mounted on said guide rods respectively, aframe pivoted t'o said supports, a, rollerv .i lis following nietswholly supported by said. pan, Viz. two apron rolls, two arms piyotedland embracing the associated guide rod and having an outwardlyprojecting shoulder at its end, a rack assooiatedlwith each support andhaving eyes which slidably embrace the sleeve which is ixed thereto, ashaft, pinions fixed theretoA engaging with said' two racks, e uidpressure oyiinder and a rack connected with the piston' thereof YIer en!gageinent with a pinion upon said shaft. 8. in Combination witlifarubber niixing` mill which includes two mixing rolls, of a pan securedbelow saidmi'xing :coils and the to the pan on alined axes, o. feedapron roll which is rotatabiy supported by said two arms, an endlessfeed apron which embraces y said three roilsandmay be caused to oontaotwith one 'ofthe mixing rolls by swinging of said two arms about theirsupported yieidi `-increasing the pressure upon said apron.

axes, and means for tightening sai{Lfpro'nuv and thereby increasing thepressure .of said apron against the mixing roll with which it contacts.y s s 9. ln combination with a. rubber mixing mill whichinoludes-two'mixing rolls, o 'a pan located below said mixing rolls, two

apron rolls mounted insbearings supl'portedv by, said pan, two armspivotedto lsaid pan on alined axes, e, feed apron roll which is.l

rotatably supported by said two arms, an end-less feed apron, whichembraces said with one of the mixing rolls by the swinging of said twoarms about their supporting axis, and means supported by said pian forngly tighteningfsaid apron and thereby In testimony whereof hereuntoaiiix my signaturoin the presence of two witnesses.

. o .i PARK E. WELTON. Witnesses: Y

Henny A.' WELTON, -5. E. WEIsER. I

` three rolls and may be -cau'sed to Contact

